| Translated title of the contribution | On A characteristic of congruence subgroups of the group 𝐺 = 𝑆𝐿(2,ℤ) |
|---|---|
| Original language | Russian |
| Article number | Mi faa2659 |
| Pages (from-to) | 89-90 |
| Number of pages | 2 |
| Journal | Функциональный анализ и его приложения |
| Volume | 4 |
| Issue number | 2 |
| State | Published - 1970 |
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